Gemstone



FIG. 1 is a top perspective view of the gemstone, showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side view thereof,

FIG. 5 is a side view from the side opposite to the one shown in FIG. 4 thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a gemstone, as shown. 